计算齿数节圆直径mm圆周率节距mm齿数723.14828.26计算节圆齿数圆周率节距mm节圆直径mm243.14538.21656051计算节线齿数节距mm中心距mm节线长mm24510482216齿顶圆计算型号齿数齿距节顶距(2δ)节圆齿顶圆3M2830.76226.7380325.976035M2851.14444.5633843.419388M2881.37271.3014169.9294114M28142.794124.7775121.983520M28204.432178.2535173.8215